- Digital Hybrid Wireless™ technology
- Up to 256 UHF frequencies in 100kHz steps
- Microprocessor controlled operation
- 250 mW power output for long range use (50 mW for export versions & IFBT4-VHF)
- Pilot tone squelch control
- Multi-use XLR input jack
- Built-in microphone preamp
- DIP switch programmable intercom input
- Tx mute for frequency scrolling
- Multi-function LCD display
- Compact size for use anywhere
- Rugged machined aluminum construction
- (VHF model) Offers 239 Frequencies between 174 and 215 MHz
- Protective leather pouch is included
The Lectrosonics IFBT4 & IFBT4-VHF transmitters were designed for use in broadcast, motion picture, theater, and stage applications where extended operating range and high-quality audio are essential. The transmitters can be used as a stand-alone devices or patched directly into popular intercom systems.
Wide frequency options provide exceptional flexibility in coordinating frequencies in multi-channel wireless systems and avoiding interference from external RF signal sources and noise. Microprocessor control provides user-friendly operation and eliminates transients at turn-on and turn-off. The transmitter output is muted in the TUNE mode to avoid generating interference in other wireless systems while scrolling up and down to change frequencies.
* The design is based upon the patented Lectrosonics Digital Hybrid Wireless® system. While at the time of the first release of the product, there is only a companion analog receiver, the Digital Hybrid Wireless system is included for compatibility with future products.
Included Accessories
- 1 – Pouch (Part #CCMINI)
- 1 – Locking Power Cable With Pigtail (Part #21586)
- 1 – Power Supply (Part #DCR12/A5U)
- 1 – Transmitter Antenna(Part #A500RAXX) (cut to block)
- 1 – Manual
Accessories
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
IFBT4 Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
IFBT4 v6.7 – 06 January 2025
Added 70, 100, 120, and 150 Hz options to the Low Frequency Rolloff feature.
IFBT4 v6.3 – 17 December 2018
Adjust audio processing to decrease distortion when input is driven deep into limiting. Improvement may not be noticeable in normal operation.
IFBT4 v6.2 – 11 October 2018
Introduces “Nu Hybrid” compat mode, which replaces the legacy “400” mode. “Nu Hybrid” mode conforms to the ETSI standard now in effect for wireless microphone transmitters in the United States. Version 6.x firmware is for use in units shipping with these FCC ID numbers:
- DBZIFBT447A
- DBZIFBT419A
- DBZIFBT420A
- DBZIFBT421A
- DBZIFBT422A
- DBZIFBT423A
All new product shipped after October 13th, 2018 to US customers will bear these FCC ID numbers and use 6.x firmware.
IFBT4 v1.5 – 18 September 2013
Added full frequency block 23 coverage for Australian export models.
IFBT4 v1.4 – 26 September 2008
- Added external power voltage readout feature and automated warnings if voltage is out of range.
- TV channel is now correctly reported on blocks 470 and 19.
IFBT4 v1.3 – 22 January 2008
- Replaced subsonic filter with a quieter one, for a slight improvement in noise performance.
- Enhanced support for frequency block 944, added support for frequency blocks 470 and 19.
IFBT4 v1.2 – 13 June 2007
Added support for frequency block 944.
IFBT4 v1.1 – 28 March 2007
Made changes to certain factory testing functions for ease of manufacturing. There is no change to features or performance.
IFBT4 v1.0 – 11 January 2007
First production release.
IFBT4-VHF Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
IFBT4-VHF v6.01 – 06 January 2025
Added 70, 100, 120, and 150 Hz options to the Low Frequency Rolloff feature.
IFBT4-VHF v6.00 – 11 October 2018
Introduces “Nu Hybrid” compat mode, which replaces the legacy “400” mode. “Nu Hybrid” mode conforms to the ETSI standard now in effect for wireless microphone transmitters in the United States. Version 6.x firmware is for use in units shipping with this FCC ID number:
- DBZIFBT4VHFA
All new product shipped after October 13th, 2018 to US customers will bear these FCC ID numbers and use 6.x firmware.
IFBT4-VHF v1.01 – 07 May 2018
Fixed a bug wherein it had been possible, via sustained key presses, to alter locked settings.
IFBT4-VHF v1.00 – 26 September 2015
First production release.
IFBT4-E01 Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
IFBT4-VHF v6.01 – 06 January 2025
Added 70, 100, 120, and 150 Hz options to the Low Frequency Rolloff feature.
IFBT4-VHF v6.00 – 11 October 2018
Introduces “Nu Hybrid” compat mode, which replaces the legacy “400” mode. “Nu Hybrid” mode conforms to the ETSI standard now in effect for wireless microphone transmitters in the United States. Version 6.x firmware is for use in units shipping with this FCC ID number:
- DBZIFBT4VHFA
All new product shipped after October 13th, 2018 to US customers will bear these FCC ID numbers and use 6.x firmware.
IFBT4-VHF v1.01 – 07 May 2018
Fixed a bug wherein it had been possible, via sustained key presses, to alter locked settings.
IFBT4-VHF v1.00 – 26 September 2015
First production release.
